University of North Florida
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Stuart Chalk, Ph.D.
Department of Chemistry
University of North Florida
Phone: 1-904-620-1938
Fax: 1-904-620-3535
Website: @unf

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Classification: Plant -> apple leaves

Citations 2

"Flow Injection Flame Atomic Absorption Spectrometry For Slurry Atomization. Determination Of Calcium, Magnesium, Iron, Zinc And Manganese In Vegetables"
Anal. Chim. Acta 1993 Volume 283, Issue 1 Pages 393-400
P. Viñas, N. Campillo, I. López García and M. Hernández Córdoba*

Abstract: Washed cauliflower, bean, citrus and apple leaves were cut up, dried at 90°C, ground and calcined at 500°C for 1.5 h. The residue was ground and, for the determination of Fe, Mn and Zn with direct calibration, suspended in 10% glycerol solution containing 1% HCl, sonicated for 5 min and stirred for 10 min. The slurry was injected into a water carrier stream, which passed to the air-acetylene flame of the AAS instrument. The peak height of the transitory signal was measured. In the alternative standard addition method, the carrier was 10% glycerol/1% HCl containing added Mn(II), Fe(III) or Zn. For the determination of Ca and Mg, the ash was suspended in 1% HCl containing 1% La and 0.02% Triton X-100 and the slurry was injected into the online dilution device shown diagrammatically (Lopez Garcia et al., J. Anal. Atomic Spectrom., 1992, 7, 1291) with the same HCl-based solution as carrier. The determination limits were 12.4, 3.3 and 5.7 µg/g for Fe, Zn and Mn, respectively, and the corresponding RSD (n = 10) were 1.7, 0.9 and 0.8% at 57, 16 and 20 µg/g, respectively. In grapefruit leaves containing 0.4% Mg and 5.18% Ca, the RSD (n = 10) were 1.2 and 1.1%, respectively.
Calcium Magnesium Iron Zinc Manganese Spectrophotometry Slurry Triton X Standard additions calibration Surfactant

"Hydride-generation Atomic Absorption Spectrometry Coupled With Flow Injection Analysis"
Anal. Chem. 1985 Volume 57, Issue 7 Pages 1382-1385
Manabu Yamamoto, Makoto Yasuda, and Yuroku Yamamoto

Abstract: Flow injection analysis was combined with the gas-segmentation method described by Skeggs (Am. J. Clin. Pathol., 1957, 28, 311) for the determination of As, Sb, Bi, Se and Te. On synthetic samples the coefficient of variation were between 0.5 and 0.8% (n = 10) with detection limits between 0.04 and 0.3 ng. The results on NBS steel, wheat and rice flour, orchard leaves and coal fly ash were close to certified values and the differential determination of As and Sb in thermal water was possible. Tolerance limits for diverse ions are listed.
Arsenic Antimony Bismuth Selenium Tellurium Spectrophotometry Reference material Segmented flow